Move ArrayBuffer.prototype.slice implementation to C++

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 1419 matching lines @@
   // Checks whether this object has the same value as the given one.
   // +0 and -0 are treated equal. Everything else is the same as SameValue.
   // This function is implemented according to ES6, section 7.2.4 and is used
   // by ES6 Map and Set.
   bool SameValueZero(Object* other);
 
   // ES6 section 9.4.2.3 ArraySpeciesCreate (part of it)
   MUST_USE_RESULT static MaybeHandle<Object> ArraySpeciesConstructor(
       Isolate* isolate, Handle<Object> original_array);
 
+  // ES6 section 7.3.20 SpeciesConstructor ( O, defaultConstructor )
+  MUST_USE_RESULT static MaybeHandle<Object> SpeciesConstructor(
+      Isolate* isolate, Handle<JSReceiver> recv,
+      Handle<JSFunction> default_ctor);
+
   // Tries to convert an object to an array length. Returns true and sets the
   // output parameter if it succeeds.
   inline bool ToArrayLength(uint32_t* index);
 
   // Tries to convert an object to an array index. Returns true and sets the
   // output parameter if it succeeds. Equivalent to ToArrayLength, but does not
   // allow kMaxUInt32.
   inline bool ToArrayIndex(uint32_t* index);
 
   // Returns true if the result of iterating over the object is the same
@@ skipping 10126 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_